Answer:
The 95% confidence interval is "87.94, 91.86".
Step-by-step explanation:
The given values are:
Sample batches,
n = 25
Sample mean concentration,
= 89.9 mg
Amount of chemical,
σ = 5
α = 0.05
The critical value from Z table will be:
=
=
=
Now,
The confidence interval will be:
=
On substituting the values, we get
=
=
=
Lower limit will be:
=
=
Upper limit will be:
=
=
Answer:
2,4 -1,2 2,1
Step-by-step explanation:
Answer:
Start by combining like terms, than you subtract and or add to both signs of the = sign, lastly you do the same thing with division and multiplication.
Step-by-step explanation:
Answer:
40,000
Step-by-step explanation:
You just add 60,000 and 30,000 which makes 90,000 and subtract it with the 50,000 then which equals to 40,000. <em>you don't need to rate me.</em>
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